Three frosted sugar cookie bars stacked on top of one another.

Sugar Cookie Bars

  • Author: Julianne Dell
  • Prep Time: 20 minutes
  • Cook Time: 18 minutes
  • Total Time: 38 minutes
  • Yield: 15 bars


Thick and chewy sugar cookie bars are so easy to make, topped with creamy vanilla buttercream frosting (and plenty of sprinkles!).


For the cookie bars:

  • 1 cup (226g) unsalted butter
  • 2 cups (380g) granulated sugar
  • 2 large eggs
  • 1 teaspoon (5ml) vanilla extract
  • 3 ½ cups (420g) all-purpose flour
  • ½ teaspoon baking soda
  • ½ teaspoon cream of tartar

For the frosting:

  • 1 cup (226g) unsalted butter
  • 3 ½ cups (455g) powdered sugar
  • 1 tablespoon (15ml) heavy whipping cream
  • 1 teaspoon (15ml) vanilla bean paste or vanilla extract


For the cookies:

  1. Preheat oven to 375° F
  2. Combine butter with sugar and beat on medium speed until well creamed together. Add the eggs and vanilla extract. Mix into the butter and sugar until the eggs are well beaten.
  3. In a separate bowl, combine flour, baking soda, and cream of tartar. Slowly add it into the batter and beat on medium-low speed until well combined and dough forms.
  4. Press the cookie dough into a 9-inch by 13-inch pan lined with parchment paper.
  5. Bake at 375°F 18-20 minutes. Allow the cookie bars to cool completely.

For the frosting:

  1. Cut butter into pieces. Using the paddle attachment, whip butter for 5-7 minutes, scraping down the bowl occasionally. Beat until the butter looks light in color.
  2. Add 2 cups powdered sugar and mix on low speed until incorporated into the butter. Next, add the heavy whipping cream and mix to combine. Finally add the remaining powdered sugar, and vanilla bean paste and whip it on high for at least 2 minutes until it’s light and fluffy.
  3. Spread over cooled cookie bars, slice, and enjoy.


    • Storing. These frosted bars will be at their freshest for up to 3 days at room temperature. Store cookie bars airtight or covered tightly in plastic wrap.

    • Freezer. Unfrosted sugar cookie bars can be stored airtight and frozen for up to 3 months. Thaw the cookie bars in the fridge overnight before frosting and slicing.

Nutrition Information:
1 bar
  • Category: Cookies
  • Method: Oven
  • Cuisine: American